CN1535355A - Solenoid drive apparatus - Google Patents
Solenoid drive apparatus Download PDFInfo
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- CN1535355A CN1535355A CNA028149572A CN02814957A CN1535355A CN 1535355 A CN1535355 A CN 1535355A CN A028149572 A CNA028149572 A CN A028149572A CN 02814957 A CN02814957 A CN 02814957A CN 1535355 A CN1535355 A CN 1535355A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/06—Modifications for ensuring a fully conducting state
- H03K17/063—Modifications for ensuring a fully conducting state in field-effect transistor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
- H03K17/08142—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in field-effect transistor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
- F02D2041/2006—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost capacitor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
- H01F7/1816—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current making use of an energy accumulator
Abstract
In a solenoid driving device of the type in which energy stored in a capacitor is used for re-driving of the solenoid, the generation of heat in the current back-flow preventing circuit that prevents the back-flow of current to the power supply terminal is suppressed, and the generation of heat in the rectifying element through which the current that flows to the capacitor passes is also suppressed. Electric power that is accumulated in the solenoid when the driving of the solenoid is stopped is temporarily stored in a capacitor, and a high voltage that is generated by the charging utilizing the peak voltage of the capacitor is utilized as the power supply for a discharge control circuit that is used to control the discharge of this capacitor. A current back-flow preventing circuit is constructed from a switching element such as an FET or the like, so that the generation of heat in this circuit is suppressed. Furthermore, a rectifying element through which the current that flows to the capacitor passes is constructed from a switching element such as an FET or the like, so that the generation of heat in this element is suppressed.
Description
Background of invention
1. invention field
The present invention relates to a kind of oiling electromagnetic coil, be used for supplying fuel is given the electronic control oiling device of engine or analog, relate more specifically to a kind of electromagnetic actuator device, the mode that it adopts is: when the electromagnetic coil driving stops, the electric energy that is accumulated in the electromagnetic coil temporarily is stored in the capacitor, and when electromagnetic coil was driven again, the electric energy that is stored in the capacitor was supplied with electromagnetic coil.
2. association area is described
Fig. 8 is the structured flowchart of expression electromagnetic actuator device commonly used.This electromagnetic actuator device by electromagnetic coil 11, be used for driving Electromagnetic Drive element 12, the Electromagnetic Drive element controling circuit 13 of electromagnetic coil 11, to control the open/close conversion of Electromagnetic Drive element 12 on the basis of the control signal of importing from the external world and when the driving of electromagnetic coil 11 stops, being used for consuming the buffer circuit 14 that is accumulated in electric energy in the electromagnetic coil 11 and constituting.In Fig. 8,15 expressions apply supply voltage (cell voltage) V
BSupply terminals, 16 expression control signal input terminals.
In the occasion of the electromagnetic actuator device of structure as shown in Figure 8, when Electromagnetic Drive element 12 is in " connection " state, electric current flow through electromagnetic coil 11 and oiling behind a fixed time period.After fixed time period under this state was gone over, Electromagnetic Drive element 12 converted " disconnection " state to, so that stop oiling.At this moment, the electric current that has flowed into electromagnetic coil 11 flows into buffer circuit 14, and electric energy is consumed by this buffer circuit 14.As a result, the electric current that flows into electromagnetic coil 11 reduces gradually, and finally is zero, and oiling is stopped.
Fig. 9 is the circuit diagram of the concrete structure of expression electromagnetic actuator device shown in Figure 8.Electromagnetic Drive element 12 is made of N slot field-effect transistor (call this in the following text and be " FET ") 121.Electromagnetic Drive element controling circuit 13 is made of a npn transistor 131 and four resistance 132,133,134 and 135.Buffer circuit 14 is made of Zener diode 141.
One end of electromagnetic coil 11 links to each other with supply terminals 15, and the other end links to each other with the drain electrode of FET121 and the negative electrode of Zener diode 141.The plus earth of the source electrode of FET121 and Zener diode 141.The collector electrode of npn transistor 131 with link to each other with the grid of FET121.First resistance 132 is connected between collector electrode and the supply terminals 15.The base stage of npn transistor 131 links to each other with control signal input terminal 16 via second resistance 133.Control signal input terminal 16 is promoted to supply voltage V by the 3rd resistance 134
CCThe emitter of npn transistor 131 links to each other and ground connection with base stage via the 4th resistance 135.
Figure 10 is the circuit diagram of another routine concrete structure of expression electromagnetic actuator device shown in Figure 8.In electromagnetic actuator device shown in Figure 10, the anode of the Zener diode 141 in the device shown in Figure 9 links to each other with the collector electrode of npn transistor 131 via the 5th resistance 136, substitute ground connection, diode 142 is connected between the negative electrode and electromagnetic coil 11 of Zener diode 141, makes this diode be oriented in electric current flows into Zener diode from electromagnetic coil 11 direction.
But as the occasion of Fig. 8 to the electromagnetic actuator device of structure shown in Figure 10, when the capacity of electromagnetic coil 11 increased, the electric energy that is consumed by buffer circuit 14 increased considerablely, made the generation of heat become problem.So, for the generation that reduces this heat with obtain effective utilization of electric energy and the purpose of the actuating speed of increase, calutron with following structure is well-known, this structure is: when the coil current that flows into electromagnetic coil stops, the energy of accumulation temporarily is stored in the capacitor, and when coil current flows into electromagnetic coil again, being stored in energy in the capacitor by utilization, coil current increases suddenly.
Figure 11 is expression is stored in the structure of the electromagnetic actuator device commonly used that electric energy is utilized in the capacitor in the driving again of electromagnetic coil a block diagram.This electromagnetic actuator device is by electromagnetic coil 11, Electromagnetic Drive element 12, Electromagnetic Drive element controling circuit 13, the temporary transient capacitor of the energy that accumulates, the discharge control unit 22 of control capacitor 21 discharges, the charge/discharge control circuit 23 of controlling the ON/OFF conversion of discharge control unit 22, the lifting supply voltage V of storing when Electromagnetic Drive stops
BAnd high-tension DC-DC change-over circuit 24 is provided, is being stored in and prevents when high voltage in the capacitor is applied to electromagnetic coil 11 that the electric current backflow that voltage enters mains side from preventing from circuit 25 and preventing because of the high voltage that is stored in the capacitor 21 direct current to be constituted from the rectifier cell 26 that capacitor 21 flows into Electromagnetic Drive elements 12 to charge/discharge control circuit 23.And the structure identical with device structure shown in Figure 8 carried out mark with same-sign, and omits and describe.
The operation of the electromagnetic actuator device of formation shown in Figure 11 will be described below.At first, when Electromagnetic Drive element 12 becomes " opening " state by control Electromagnetic Drive element controling circuit 13 from " passs " state exchange, electric current begins to prevent circuit 25 inflow electromagnetic coils 11 from supply terminals 15 via electric current backflow.Then, after the past, start oiling at fixed time period.After past, Electromagnetic Drive element 12 converts " pass " state to, so that stop oiling at another fixed time period.At this moment, flowed into the electric current of electromagnetic coil via rectifier cell 26 inflow capacitors 21.Flow into simultaneously at electric current, the voltage VC of capacitor raises, and the electric energy that is accumulated in the electromagnetic coil 11 is absorbed by capacitor 21.When the electric current that flows into capacitor 21 was zero, the rising of the voltage VC of capacitor stopped simultaneously.
When re-executing oiling according to this state, Electromagnetic Drive element 12 converts " opening " state to, and the discharge control unit converts " opening " state simultaneously to.It is identical with the voltage VC of the discharge generation of capacitor 21 that the result is that the voltage VSH of the hot side of electromagnetic coil 11 becomes, and become and be higher than supply voltage V
BSo electric current begins to flow into electromagnetic coil 11 suddenly.Because this electric current flows out from capacitor 21, the voltage VC of capacitor 21, promptly the voltage VSH of the hot side of electromagnetic coil 11 descends.Then, become at the voltage VSH of the hot side of electromagnetic coil 11 and be lower than supply voltage V
BThe time this point, the electric current vanishing of flowing out from capacitor 21, and electric current begins from supply voltage V
BFlow into electromagnetic coil 11.In this occasion, the electric current that flows into electromagnetic coil 11 continues to increase to the voltage that the winding resistance by electromagnetic coil 11 is limited.
Like this, remove initial oiling, the electric current that flows into electromagnetic coil 11 because of capacitor 21 second and subsequently oiling process in the voltage that produces that charges increase suddenly.In the process of this unexpected increase, the electric current that flows out from supply terminals 15 is zero.Therefore, the electric current that flows out from supply terminals 15 descends comprehensively, makes power consumption descend.And the electric current of the electromagnetic coil 11 of flowing through rises to the value near required electric current suddenly, makes response improve.
Yet, above-mentioned electromagnetic actuator device this commonly used as shown in Figure 8, in this device, be stored in energy in the capacitor and be used for driving again electromagnetic coil, be used for supplying with high-tension DC-DC change-over circuit 24 and be absolutely necessary, thereby cause circuit to increase the problem of complexity and circuit increased in size to discharge control electric current 23.And because electric current backflow prevents that circuit 25 from proposing to be made of diode, can produce following point: promptly, when the big electric current of power supply flows through this circuit, the institute's heat that produces increase is because the voltage of diode drops to about 0.7 volt.And because the rectifier cell 26 between Electromagnetic Drive element 12 and capacitor 21 also is to be made of diode, the heat that electric current produced that therefore flows through this diode also is a problem.
The general introduction of invention
The present invention designs in view of the above problems.An object of the present invention is to provide a kind of electromagnetic actuator device, in this device, be stored in energy in the capacitor and be used for driving again electromagnetic coil, wherein, the DC-DC change-over circuit is dispensable, and prevent that electric current backflow to the electric current backflow of supply terminals from preventing that the heat that produces in the circuit from can be suppressed, flowing to the heat that the electric current of capacitor produces in flowing through rectifier cell can be suppressed.
In order to achieve the above object, electromagnetic actuator device of the present invention is designed to: make when the driving of electromagnetic coil stops, the electric weight that is accumulated in the electromagnetic coil temporarily is stored in the capacitor, the high voltage of utilizing the peak voltage of capacitor to produce by discharge is used as the power supply of charge/discharge control circuit, and this charge/discharge control circuit is used for controlling the discharge of this capacitor.In the present invention, charge/discharge control circuit is driven by the high voltage that produces in the capacitor.
In addition, in electromagnetic actuator device of the present invention, electric current backflow prevents that electric routing switch element such as FET or analog from constituting.In the present invention, when electric current when supply terminals flows to electromagnetic coil, prevent at electric current backflow that the voltage that occurs in the circuit from descending and reduce, make the heat that produces in this circuit be suppressed.
In addition, in electromagnetic actuator device of the present invention, the electric current that flows to capacitor is made of switching element such as FET or analog flowing through rectifier cell.In the present invention, when electric current when electromagnetic coil flows to capacitor, the voltage that occurs in rectifier cell descends and reduces, and makes the heat that produces in this circuit be suppressed.
The simple description of accompanying drawing
Fig. 1 is the structured flowchart that expression constitutes the electromagnetic actuator device of the embodiment of the invention 1.
Fig. 2 is the circuit diagram of an example of the structure of the expression electromagnetic actuator device that constitutes the embodiment of the invention 1.
Fig. 3 is the oscillogram of waveform example of the various parts of the expression electromagnetic actuator device that constitutes the embodiment of the invention 1.
Fig. 4 is the circuit diagram of an example of the structure of the expression electromagnetic actuator device that constitutes the embodiment of the invention 2.
Fig. 5 is the circuit diagram of an example of the structure of the expression electromagnetic actuator device that constitutes the embodiment of the invention 3.
Fig. 6 is the circuit diagram of an example of the structure of the expression electromagnetic actuator device that constitutes the embodiment of the invention 4.
Fig. 7 is the oscillogram of waveform example of the various parts of the expression electromagnetic actuator device that constitutes the embodiment of the invention 4.
Fig. 8 is the block diagram of structure of the electromagnetic actuator device of expression normal conventional.
Fig. 9 is the circuit diagram of the concrete structure of the electromagnetic actuator device shown in the presentation graphs 8.
Figure 10 is the circuit diagram of another example of the concrete structure of the electromagnetic actuator device shown in the presentation graphs 8.
Figure 11 is the block diagram of the structure of the conventional electromagnetic actuator device of expression, in this device, utilizes in the capacitor energy stored to carry out the driving again of electromagnetic coil.
The description of preferred embodiment
Describe the electromagnetic actuator device that constitutes the embodiment of the invention in detail below in conjunction with appended accompanying drawing.
Fig. 1 is the structured flowchart that expression constitutes the electromagnetic actuator device of the embodiment of the invention 1.This electromagnetic actuator device is in circuit 38, peak voltage holding circuit 39, electric current backflow by electromagnetic coil 31, Electromagnetic Drive element 32, Electromagnetic Drive element controling circuit 33, capacitor 34, supply terminals 35, control signal input end 36, discharge control unit 37, discharge and prevents that circuit 40 and rectifier cell 41 from constituting.
Peak voltage holding circuit 39 keeps the peak voltage that produced by the charging of capacitor 34, and this voltage is offered charge/discharge control circuit 38.Except peak voltage holding circuit 39, the structure of electromagnetic actuator device of the present invention is identical with the structure of the conventional electromagnetic actuator device shown in Figure 11.And, in the driving process of electromagnetic coil 31 and this driving stop during process in the operation of this electromagnetic actuator device, identical with the operation of the conventional electromagnetic actuator device shown in Figure 11.
Fig. 2 is the circuit diagram of an example of the structure of the expression electromagnetic actuator device that constitutes the embodiment of the invention 1.This electromagnetic actuator device is made of electromagnetic coil 31, two capacitors 34 and 51, two N channel fets 52 and 53, npn transistor 54, five diodes 55,56,57,58 and 59, Zener diode 60, eight resistance 61,62,63,64,65,66,67 and 68, supply terminals 35 and control signal input ends 36.The one N channel fet 52 constitutes Electromagnetic Drive element 32.The 2nd N channel fet 53 constitutes discharge control unit 37.First diode 55 constitutes rectifier cell 41.Second diode 56 constitutes electric current backflow and prevents circuit 40.
The anode of second diode 56 links to each other with supply terminals 35.The negative electrode of second diode 56 links to each other with an end of electromagnetic coil 31.The other end of electromagnetic coil 31 links to each other with the drain electrode of a N channel fet 52 and the anode of first diode 55.The source ground of the one N channel fet 52.The negative electrode of first diode 55 links to each other with the positive pole of first capacitor 34.The minus earth of first capacitor 34.And the positive pole of first capacitor 34 links to each other with the drain electrode of the 2nd N channel fet 53.The source electrode of the 2nd N channel fet 53 links to each other with an end of electromagnetic coil 31 via second diode 56 in a side that links to each other with supply terminals 35.
In addition, the anode of the 3rd diode 58 links to each other with supply terminals 35 via first resistance 61.The negative electrode of the 3rd diode 58 links to each other with the collector electrode of npn transistor 54.The grounded-emitter connection of npn transistor 54.The base stage of npn transistor 54 links to each other with control signal input end 36 via second resistance 62.Control signal input end 36 is promoted to supply voltage V by the 3rd resistance 63
CCThe 4th resistance 64 is connected between the base stage and emitter of npn transistor 54.The base stage of the one N channel fet 52 links to each other via the tie point of the 5th resistance 65 with first resistance 61 and the 3rd diode 58.Npn transistor 54, first to the 5th transistor 61,62,63,64 and the 65 and the 3rd diode 58 constitute the control circuit 33 of Electromagnetic Drive element.
In addition, the anode of Zener diode 60 links to each other in supply terminals 35.The negative electrode of Zener diode 60 links to each other with the positive pole of first capacitor 34 via the 6th resistance 66, and also links to each other with the anode of the 4th diode 59.Second capacitor 51 is connected between the negative electrode of the 4th diode 59 and second diode 56.Zener diode 60, the 6th resistance 66, the 4th diode 59 and second capacitor constitute peak voltage holding circuit 39.
The 7th resistance 67 and the 8th resistance 68 are connected between the tie point of the grid of the 2nd N channel fet 53 and the 4th diode 59 and second capacitor 51.The tie point of the 7th resistance 67 and the 8th resistance 68 links to each other with the collector electrode of npn transistor 54.The anode of the 5th diode links to each other with the source electrode of the 2nd N channel fet 53, and the negative electrode of the 5th diode links to each other with the grid of the 2nd N channel fet 53.Npn transistor 54, second to the 4th transistor 62,63 and the 64, the 7th and the 8th resistance 67 and the 68 and the 5th diode 57 constitute charge/discharge control circuit 38.
The eigenvalue of respective element will provide as an example.For example, the capacitance separately of first capacitor 34 and second capacitor 51 is 100 μ F and 0.1 μ F.The output voltage of Zener diode 60 is for example 9V.The resistance value of first resistance 61 is for example 3.3k Ω.The resistance value of second resistance 62 is 4.7k Ω for example.The resistance value of the 3rd resistance 63, the 6th resistance 66 and the 7th resistance is for example 10k Ω.The resistance value of the 4th resistance 64 is for example 47k Ω.The resistance value of the 5th resistance 65 is for example 1k Ω.The resistance value of the 8th resistance 68 is for example 2k Ω.
The operation of the electromagnetic actuator device of structure will be described in conjunction with Fig. 3 as shown in Figure 2.Fig. 3 is voltage VSH and flow through the corresponding waveform diagram of the electric current I of electromagnetic coil 31 on the hot side of the voltage VC that is illustrated in voltage VSL, first capacitor 34 on the low potential side of electromagnetic coil 31, electromagnetic coil 31.
At first, when npn transistor 54 based on from the input of the control signal of control signal input end 36 when " opening " state exchange becomes " pass " state, the one N channel fet 52 becomes " opening " state from " pass " state exchange, makes that electric current begins to flow to electromagnetic coil 31 from supply terminals 35 via second diode 56.Then, after the past, oiling is activated at fixed time period.In this occasion, because second capacitor 51 is not recharged, therefore, the 2nd N channel fet 53 remains on " pass " state.
After past, npn transistor 54 becomes " opening " state from " pass " state exchange, and a N channel fet 52 remains on " pass " state at fixed time period.In this occasion, the electric current that has flowed to electromagnetic coil 31 flows to first capacitor 34 by first diode 55.The result is, the voltage VC of first capacitor 34 raises, and is accumulated in that electric current is absorbed by first capacitor 34 in the electromagnetic coil 31.When the electric current that flows into first capacitor 34 was zero, the rising of the voltage VC of first capacitor 34 stopped simultaneously.Second capacitor 35 is also along with the charging of first capacitor 34 is recharged.At this moment, owing to there is not current direction electromagnetic coil 31, oiling stops.
When oiling was carried out in this manner once more, npn transistor 54 became " pass " state from " opening " state exchange, and a N channel fet 52 remains on " opening " state (time t0 among Fig. 3).In this occasion, because second capacitor 51 is recharged, therefore, the grid of the 2nd N channel fet 53 is in high petential.So the 2nd N channel fet 53 also converts " opening " state simultaneously to.The result is, it is identical with the voltage VC of first capacitor 34 that the voltage VSH on the hot side of electromagnetic coil 31 becomes, thus beyond supply voltage V
BTherefore, electric current begins suddenly to flow to electromagnetic coil 31 from first capacitor 34.Because flowing of this electric current, the voltage VC of first capacitor 34 is that the voltage VSH on the hot side of electromagnetic coil 31 descends.
Then, under the voltage VSH on the hot side that is in electromagnetic coil 31, be reduced to supply voltage V
BWhen (time t1 among Fig. 3), from the electric current vanishing that first capacitor 34 flows out, opposite current begins to flow to electromagnetic coil 31 from supply terminals 35 via second diode 56.The electric current that flows to electromagnetic coil 31 in this occasion continues to increase to the voltage that winding resistance limited by electromagnetic coil 31.Current direction electromagnetic coil 31 when oiling continues to carry out.
After past set time of this state, npn transistor 54 becomes " opening " state from " pass " state exchange.The result is, a N channel fet 52 converts " pass " state (time t2 among Fig. 3) to, and the electric current that has flowed to electromagnetic coil 31 flows to first capacitor 34 as mentioned above, makes the electric weight that is accumulated in the electromagnetic coil 31 be stored in first capacitor 34.In this occasion, second capacitor 35 also is recharged.Then, when electric current is zero in flowing into first capacitor 34 (time t3 among Fig. 3), oiling stops.When carrying out oiling once more, the electric weight that is stored in first capacitor 34 is supplied with electromagnetic coil 31 as mentioned above, and this repeats.
In the foregoing description 1, when the driving of electromagnetic coil 31 stops, by the electric current that flows to electromagnetic coil 31 to 34 chargings of first capacitor.The result is that second capacitor 51 of peak voltage holding circuit 39 is recharged, and the 2nd N channel fet 53 of discharge control unit 37 is driven by the voltage that this charging because of second capacitor 51 produces.Therefore, do not need the DC-DC change-over circuit, make circuit to simplify, the size of circuit can reduce.In addition, more cheap than P channel fet high-performance N channel fet (the 2nd N channel fet 53) can be used as discharge control unit 37.
Embodiment 2
Fig. 4 is the circuit diagram of an example of the structure of the expression electromagnetic actuator device that constitutes the embodiment of the invention 2.Embodiment 2 electromagnetic actuator device is different from the embodiment 1 shown in Fig. 2, and wherein, conversion element is arranged to electric current backflow and is prevented circuit, and the alternative electric current backflow that constitutes embodiment 1 prevents second diode 56 in the circuit 40.This conversion element is had no particular limits.Yet for example, this conversion element can be made of (below be called " the 3rd N channel fet 69) the N channel fet.
And, in a second embodiment, the npn transistor (below be called " the 2nd npn transistor ") 70, the 3rd capacitor 71, the 5th diode 72 and the 9th to the 12 resistance 73,74,75 and 76 is arranged to be used for control the conversion element controling circuit of the ON/OFF conversion of the 3rd N channel fet 69.All the other structures of embodiment 2 are identical with embodiment 1 structure.Therefore, indicate identical symbol, and omit and describe.
The source electrode of the 3rd N channel fet 69 links to each other with supply terminals 35.The drain electrode of the 3rd N channel fet 69 links to each other with the tie point of electromagnetic coil 31 with the 2nd N channel fet 53.The anode of the 5th diode 72 links to each other with the negative electrode of Zener diode 60 and the tie point of the 6th resistance 66.The negative electrode of the 5th diode 72 links to each other with the anode (supply terminals 35) of Zener diode 60 via the 3rd capacitor 71.The peak voltage that the 5th diode 72, the 3rd capacitor 71, Zener diode 60 and 66 maintenances of the 6th resistance are produced by the charging of first capacitor 34 is so that drive conversion element controling circuit.
The tie point of the 5th diode 72 and the 3rd capacitor 71 links to each other with the 9th resistance 73, and this 9th resistance 73 links to each other with the base stage of the 3rd N channel fet 69 via the tenth resistance 74.The collector electrode of the 2nd npn transistor 70 links to each other with the tie point of the 9th resistance 73 and the tenth resistance 74.The emitter of the 2nd npn transistor 70 links to each other with supply terminals 35.The base stage of the 2nd npn transistor 70 links to each other with the positive pole of first capacitor 34 via the 11 resistance 75.The 12 resistance 76 is connected between the base stage and emitter of the 2nd npn transistor 70.
The eigenvalue of respective element will provide as an example.For example, the capacitance of the 3rd capacitor 71 is 0.1 μ F.The resistance value of the 9th resistance 73 is for example 10k Ω.The resistance value of the tenth resistance 74 is 100 Ω for example.The resistance value of the 11 resistance 75 is for example 20k Ω.The resistance value of the 12 resistance 76 is for example 10k Ω.
In the electromagnetic actuator device of structure as shown in Figure 4, be higher than the supply voltage V that is applied to supply terminals 35 places as the voltage VC of first capacitor 34
B, the 2nd npn transistor 70 converts " opening " state to.The result is that the 3rd N channel fet 69 converts " pass " state to.Therefore, the two all converts " opening " state to a N channel fet 52 and the 2nd N channel fet 53, make when electric current suddenly when first capacitor 34 flows to electromagnetic coil 31, prevent that current reversal flows to supply terminals 35 here.
Under the voltage VC of first capacitor 34, be reduced to supply voltage V
B, the 2nd npn transistor 70 converts " pass " state to, and the 3rd N channel fet 69 converts " opening " state to.The result is that electric current flows to electromagnetic coil 31 from supply terminals 35.When the npn of Electromagnetic Drive element controling circuit 33 transistor 54 converts " opening " state to stop oiling, the 2nd npn transistor 70 converts " opening " state to, and the 3rd N channel fet 69 converts " pass " state to.In this occasion, flow to the electric current of first capacitor 34 from supply terminals 35 by the electromagnetic coil 31 and first diode 55, the diode that is comprised through the 3rd N channel fet 69.
In the foregoing description 2, owing to do not need the DC-DC change-over circuit, the effect that might obtain to simplify circuit He reduce circuit size, and the effect of N channel fet (the 2nd N channel fet 53) as 37 uses of discharge control unit.In addition, because electric current backflow prevents that circuit from being made of conversion element, therefore might obtain to suppress the effect of the heat generation that causes because of the electric current that flows through circuit.And, can use the high performance N channel fet more cheap (the 3rd N channel fet 69) as conversion element than P channel fet.
The 3rd embodiment
Fig. 5 is the circuit diagram of an example of the structure of the expression electromagnetic actuator device that constitutes the embodiment of the invention 3.The ON/OFF control that embodiment 3 electromagnetic actuator device is designed to the 3rd N channel fet 69 among the embodiment shown in Figure 42 is to carry out from the basis of the control signal of external world's input (below be called " refluence prevents control signal ").And, be denoted as the symbol identical with constituent components identical among the embodiment 2 with embodiment 2, and the description of omitting these constituent components.Below only different constituent components is described.
In embodiment 2, the base stage of the 2nd npn transistor 70 links to each other with the positive pole of first capacitor 34 via the 11 resistance 75.But in embodiment 3, this base stage flows backwards with input via resistance 75 and prevents that the terminal (refluence prevents the control signal input end) of control signal link to each other.This refluence prevents that control signal input end 77 is promoted to supply voltage V by the 13 resistance 78
BIn addition, in embodiment 3, the grounded-emitter connection of the 2nd npn transistor 70.
And the 14 resistance 79 and the 15 resistance 80 are connected between supply terminals 35 and ground connection and are linked to each other.Being used for output supply voltage to the terminal (supply voltage input end) 81 of external control device or analog links to each other with dividing point.In addition, the 16 resistance 82 and the 17 resistance 83 are connected in series between the positive pole and ground connection of first capacitor 34, and are used to export first capacitor, 34 voltage VC and link to each other with dividing point to the terminal (capacitance voltage input end) 84 of external control device or analog.In addition, the anode of the 6th diode 85 links to each other with the source electrode of the 3rd N channel fet 69, and the negative electrode of this 6th diode 85 links to each other with the grid of the 3rd N channel fet 69.
The eigenvalue of respective element will provide as an example.The resistance value of the tenth resistance 74 is for example 2k Ω.The resistance value of the 11 resistance 75 is 4.7k Ω for example.The resistance value of the 12 resistance 76 is for example 47k Ω.The resistance value of the 13 resistance 78 is for example 10k Ω.The resistance value of the 14 resistance 79 and the 16 resistance 82 is for example 19k Ω.The 15 resistance 80 is for example 1k Ω with resistance value the 17 resistance 83.
In the electromagnetic actuator device of structure as shown in Figure 5, the 2nd npn transistor 70 converts " opening " state to, and the 3rd N channel fet 69, when the voltage VC of first capacitor 34 is higher than supply voltage V
BThe time convert " pass " state to by external control device or analog.The result is to prevent that the current reversal that flows to electromagnetic coil 31 from first capacitor 34 suddenly from flowing to supply terminals 35.Under the voltage VC of first capacitor 34, be reduced to supply voltage V
B, the 2nd npn transistor 70 converts " pass " state to, and the 3rd N channel fet 69 converts " opening " state to, makes electric current flow to electromagnetic coil 31 from supply terminals 35.When the driving of electromagnetic coil 31 stops when stopping oiling, the 2nd npn transistor 70 converts " pass " state equally to, and the 3rd N channel fet 69 converts " opening " state to, makes electric current flow to electromagnetic coil 31 from supply terminals 35.
In the foregoing description 3, except because of not needing the DC-DC change-over circuit might simplify circuit and reducing the effect of circuit size, and might use outside the effect of N channel fet 53 and 69, when the 3rd N channel fet 69 is in " opening " state, first capacitor 34 is charged.Therefore, might obtain than in embodiment 2, better suppressing the effect that electric current backflow prevents that heat produces in the circuit.
Embodiment 4
Fig. 6 is the circuit diagram of an example of the structure of the expression electromagnetic actuator device that constitutes the embodiment of the invention 4.Embodiment 4 electromagnetic actuator device is different from the embodiment 3 shown in Fig. 5, wherein, conversion element is set, and substitutes first diode 55 in the rectifier cell that constitutes embodiment 3.This conversion element is had no particular limits.Yet for example, this conversion element can be made of N channel fet (below be called " the 3rd N channel fet) 86, and the ON/OFF of this conversion element is by controlling from the control signal of external world's input (below be called " electric capacity charging control signal ").And, in the 4th embodiment, the npn transistor (below be called " the 3rd npn transistor ") 87, the 4th capacitor 88, the 7th and the 8th diode 89 and 90, second Zener diode 91 and the 18 to the 23 resistance 92,93,94,95,96 and 97 is arranged to be used for control the conversion element controling circuit of the ON/OFF conversion of the 4th N channel fet 86.All the other structures of embodiment 4 are identical with embodiment's structure.Therefore, specify as be used for identical symbol of the embodiment 3, omit so describe.
The source electrode of the 4th N channel fet 86 links to each other with the tie point of electromagnetic coil 31 with a N channel fet 52.The drain electrode of the 4th N channel fet 86 links to each other with the positive pole of first capacitor 34.The anode of second Zener diode 91 links to each other with source electrode with the 4th N channel fet 86, and the negative electrode of this diode links to each other with the drain electrode of the 4th N channel fet 86 via the 18 resistance 92.The anode of the 9th diode 89 links to each other with the negative electrode of second Zener diode 91 and the tie point of the 18 resistance 92.The negative electrode of the 7th diode 89 links to each other with the anode of second Zener diode 91 via the 4th capacitor 88.The peak voltage that the 7th diode 89, the 4th capacitor 88, second Zener diode 91 and 92 maintenances of the 18 resistance are produced by the charging of first capacitor 34 is so that drive conversion element controling circuit.
The tie point of the 7th diode 89 and the 4th capacitor 88 links to each other with the 19 resistance 93, and this 19 resistance 93 links to each other with the base stage of the 4th N channel fet 86 via the 20 resistance 94.The collector electrode of the 3rd npn transistor 87 links to each other with the tie point of the 19 resistance 93 and the 20 resistance 94.The grounded-emitter connection of the 3rd npn transistor 87.The base stage of the 3rd npn transistor 87 links to each other with the terminal (electric capacity charging control signal input end) 98 of input capacitor charging control signal via the 21 resistance.Electric capacity charging control signal input end 97 is promoted to supply voltage V by the 22 resistance 96
CCThe 23 resistance 97 is connected between the base stage and emitter of the 3rd npn transistor 87.In addition, the anode of the 8th diode 90 links to each other with the 4th N channel fet 86 source electrodes, and the negative electrode of the 8th diode 90 links to each other with the 4th N channel fet 86 grids.
The eigenvalue of respective element will provide as an example.For example, the capacitance of the 4th capacitor 88 is 0.1 μ F.The output voltage of second Zener diode 91 is that for example 9V. the 18, the 19 and the 22 resistance 92,93 and 96 resistance value are for example 10k Ω.The resistance value of the 20 resistance 94 is 2k Ω for example.The resistance value of the 21 resistance 95 is for example 4.7k Ω.The resistance value of the 23 resistance 97 is for example 47k Ω.
Fig. 7 is voltage VSH on the hot side of the voltage VC that is illustrated in voltage VSL, first capacitor 34 on the low potential side of electromagnetic coil 31, electromagnetic coil 31, flow through the electric current I of electromagnetic coil 31 and via the oil gun driving pulse of control signal input end 36 inputs, flowing backwards prevents the respective waveforms figure of control signal and capacitor charging control signal.In the electromagnetic actuator device of structure as shown in Figure 6, flowing backwards prevents that control signal is set to high petential, and is higher than supply voltage V at the voltage VC of first capacitor 34
BThe time, the 2nd npn transistor 70 converts " pass " state to by external control device or analog.The result is that the 3rd N channel fet 69 converts " pass " state to, thereby prevents that the current reversal that flows to electromagnetic coil 34 from first capacitor 34 suddenly from flowing to supply terminals 35.
When the voltage VC of first capacitor 34 is lower than supply voltage V
BThe time, flowing backwards prevents that control signal is set to low potential, makes the 2nd npn transistor 70 convert " pass " state to.The result is that the 3rd N channel fet 69 converts " opening " state to, makes electric current flow to electromagnetic coil 31 from supply terminals 35.Convert high petential to when stopping oiling at the oil gun driving pulse from low potential, the capacitor charging control signal converts low potential to from high petential, makes the 3rd npn transistor 87 that is in " opening " state convert " pass " state to.The result is, the 4th N channel fet 86 becomes " opening " state from " pass " state exchange, makes current direction first capacitor 34.Between first capacitor, 34 charge period, electric current prevents that control signal from keeping low potential, and the 3rd N channel fet 69 converts " opening " state to, makes electric current flow to electromagnetic coil 31 from supply terminals 35.In that the charging of first capacitor 34 is basic when finishing, electric current prevents that control signal and capacitor charging control signal all are back to high petential, the 3rd and the N channel fet 69 and 86 all convert " pass " state to.
In above-mentioned the 4th embodiment, because of the effect that does not need the DC-DC change-over circuit to obtain to simplify circuit and reduced circuit size.In addition, also obtain to use the effect of N channel fet 53 and 69, and might be suppressed at the effect that electric current backflow prevents to produce in the circuit heat.And, because rectifier cell is made of the conversion element that constitutes the 4th N channel fet 86, also obtained to be suppressed at the effect that produces heat in this circuit.And, can use the high-performance N channel fet more cheap (the 4th N channel fet 86) as conversion element than PN channel fet.
In addition, to embodiment 4, utilize the energy that is stored in first capacitor that the coil current of electromagnetic coil 31 is increased suddenly at the foregoing description 1.Therefore, thus can obtain to allow high-speed driving to cause reducing the effect of current loss.Because current drain reduces, the heat that is produced by electromagnetic coil 31 can be suppressed.When the rising of coil current was quickened, the dynamic range of the ratio of the time of the actual injection that acts as a fuel and oil gun driving pulse width broadened, and made to be convenient to oiling control.And because electric current backflow prevents that circuit from being made of a FET, so electric current backflow prevents that pressure drop is about 0.1V in the circuit, the pressure drop (0.7 to 1.0V) during than use diode occasion is littler.Therefore, the driving voltage of electromagnetic coil significantly increases, thus the effect of the oiling performance that is improved.
The present invention is not limited to the foregoing description, can carry out various variations.For example, constitute electric current backflow and prevent that the conversion element of circuit and rectifier cell are not limited to the N channel fet, also can use the P channel fet.In addition, also can use npn or pnp bipolar transistor.And Electromagnetic Drive element and discharge control unit equally also are not limited to the N channel fet, also can use the P channel fet, can use npn or pnp bipolar transistor.In addition, the present invention be certainly applicable to being flow into the oil gun of conventionally form by pressurization of petrolift or regulator and the fuel of presenting, and also play a part petrolift applicable to oil gun and inject the novel oiling device of fuel in to the fuel pressurization.Also play in the system of petrolift effect at oil gun, above-mentioned dynamic range tends to littler than the oil gun of conventionally form.Therefore, the present invention is effective especially in this system.
In the present invention, charge/discharge control circuit is by the high voltage drive that produces in the capacitor.Therefore, do not need the DC-DC change-over circuit, thereby can simplify circuit and reduce size.In addition, in the present invention, when electric current when supply terminals flows to electromagnetic coil, appear at electric current backflow and prevent that the pressure drop in the circuit from reducing, thereby be suppressed at the heat that produces in this circuit.And, in the present invention, when electric current when electromagnetic coil flows to capacitor, the pressure drop that appears in the rectifier cell reduces, thereby is suppressed at the heat that produces in this element.
Claims (11)
1. an electromagnetic actuator device is characterized in that, described device comprises:
The oiling electromagnetic coil;
Capacitor, when it stopped in the driving of described electromagnetic coil, temporary transient storage was accumulated in the electric energy in the described electromagnetic coil, and discharge when described electromagnetic coil drives again, thereby an electric energy that stores is supplied with described electromagnetic coil;
Control the discharge control unit of the discharge of described electromagnetic coil; And
Charge/discharge control circuit, its peak value that utilizes described capacitor is charged and the voltage that produces as power supply, and control described discharge control unit.
2. electromagnetic actuator device as claimed in claim 1 is characterized in that, described discharge control unit is a field effect transistor.
3. an electromagnetic actuator device is characterized in that, described device comprises:
The oiling electromagnetic coil;
Apply the supply terminals of supply voltage;
Capacitor, when it stopped in the driving of described electromagnetic coil, temporary transient storage was accumulated in the electric energy in the described electromagnetic coil, and discharge when described electromagnetic coil drives again, thereby an electric energy that stores is supplied with described electromagnetic coil; And
Conversion element, it charges and the voltage that produces when being higher than supply voltage at the peak value of described capacitor, cuts off described supply terminals from described electromagnetic coil.
4. an electromagnetic actuator device is characterized in that, described device comprises:
The oiling electromagnetic coil;
Apply the supply terminals of supply voltage;
Capacitor, when it stopped in the driving of described electromagnetic coil, temporary transient storage was accumulated in the electric energy in the described electromagnetic coil, and discharge when described electromagnetic coil drives again, thereby an electric energy that stores is supplied with described electromagnetic coil;
Control the discharge control unit of the discharge of described capacitor;
Charge/discharge control circuit, its peak value that utilizes described capacitor is charged and the voltage that produces as power supply, and control described discharge control unit; And
Conversion element, it charges and the voltage that produces when being higher than supply voltage at the peak value of described capacitor, cuts off described supply terminals from described electromagnetic coil.
5. as claim 3 or 4 described electromagnetic actuator devices, it is characterized in that, described device also comprises conversion element controling circuit, its peak value that utilizes described capacitor is charged and the voltage that produces as power supply, and control the ON/OFF conversion of described conversion and control element.
6. as the described electromagnetic actuator device of claim 3 to 5, it is characterized in that described discharge control unit is a field effect transistor.
7. as claim 3 or 4 described electromagnetic actuator devices, it is characterized in that described conversion element is controlled from the control signal basis of external world's input.
8. an electromagnetic actuator device is characterized in that, described device comprises:
The oiling electromagnetic coil;
Capacitor, when it stopped in the driving of described electromagnetic coil, temporary transient storage was accumulated in the electric energy in the described electromagnetic coil, and discharge when described electromagnetic coil drives again, thereby an electric energy that stores is supplied with described electromagnetic coil; And
Conversion element, its when the driving of described electromagnetic coil stops being accumulated in electrical power storage in the described electromagnetic coil in described capacitor the time, connect the current path between described electromagnetic coil and the described capacitor, and the electric energy in being stored in described capacitor cuts off described electromagnetic coil from described capacitor when supplying with described electromagnetic coil.
9. electromagnetic actuator device as claimed in claim 8 is characterized in that, described discharge control unit is a field effect transistor.
10. an electromagnetic actuator device is characterized in that, described device comprises:
The oiling electromagnetic coil;
Apply the supply terminals of supply voltage;
Capacitor, when it stopped in the driving of described electromagnetic coil, temporary transient storage was accumulated in the electric energy in the described electromagnetic coil, and discharge when described electromagnetic coil drives again, thereby an electric energy that stores is supplied with described electromagnetic coil;
Control the discharge control unit of the discharge of described capacitor;
Charge/discharge control circuit, its peak value that utilizes described capacitor is charged and the voltage that produces as power supply, and control described discharge control unit;
First conversion element, it charges and the voltage that produces when being higher than supply voltage at the peak value of described capacitor, cuts off described supply terminals from described electromagnetic coil; And
Second conversion element, its when the driving of described electromagnetic coil stops being accumulated in electrical power storage in the described electromagnetic coil in described capacitor the time, connect the current path between described electromagnetic coil and the described capacitor, and, cut off described electromagnetic coil from described capacitor being stored in electric energy in the described capacitor when supplying with described electromagnetic coil.
11. electromagnetic actuator device as claimed in claim 10 is characterized in that, described discharge control unit is a field effect transistor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP235621/2001 | 2001-08-02 | ||
| JP2001235621A JP4794768B2 (en) | 2001-08-02 | 2001-08-02 | Solenoid drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1535355A true CN1535355A (en) | 2004-10-06 |
| CN1314892C CN1314892C (en) | 2007-05-09 |
Family
ID=19067036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028149572A Expired - Fee Related CN1314892C (en) | 2001-08-02 | 2002-08-01 | Solenoid drive apparatus |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7154729B2 (en) |
| EP (1) | EP1424477A4 (en) |
| JP (1) | JP4794768B2 (en) |
| KR (1) | KR20040018531A (en) |
| CN (1) | CN1314892C (en) |
| TW (1) | TW536583B (en) |
| WO (1) | WO2003014556A1 (en) |
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| CN101319635B (en) * | 2005-11-30 | 2011-12-28 | 三菱电机株式会社 | Fuel injection device for engine |
| CN101118816B (en) * | 2006-08-04 | 2012-09-26 | 株式会社日立制作所 | High-pressure fuel pump drive circuit for engine |
| CN105144581A (en) * | 2013-04-25 | 2015-12-09 | 日立汽车系统株式会社 | Electromagnetic coil driving control device |
| CN114320635A (en) * | 2020-09-30 | 2022-04-12 | 日立安斯泰莫株式会社 | Solenoid valve driving device |
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| US7279773B2 (en) * | 2005-03-15 | 2007-10-09 | Delphi Technologies, Inc. | Protection device for handling energy transients |
| US20090309054A1 (en) * | 2008-06-11 | 2009-12-17 | Automatic Switch Company | System and method of operating a solenoid valve at minimum power levels |
| US8373373B2 (en) * | 2010-06-28 | 2013-02-12 | Eaton Corporation | Input circuit for alternating current signal, and motor starter including the same |
| US8214132B2 (en) | 2010-09-17 | 2012-07-03 | Caterpillar Inc. | Efficient wave form to control fuel system |
| KR101498809B1 (en) * | 2012-09-05 | 2015-03-04 | 나부테스코 가부시키가이샤 | Driving circuit for electromagnetic valve |
| JP6240511B2 (en) * | 2014-01-09 | 2017-11-29 | 日立オートモティブシステムズ株式会社 | Electronic control unit |
| JP6800586B2 (en) * | 2016-01-27 | 2020-12-16 | 株式会社小糸製作所 | Vehicle lighting |
| JP6522228B2 (en) * | 2016-02-25 | 2019-05-29 | 三菱電機株式会社 | DC power supply device and refrigeration cycle applicable device |
| KR101877299B1 (en) * | 2016-04-07 | 2018-07-11 | (주)모토닉 | Control apparatus and method of flow control valve for high pressure fuel pump |
| US10727737B2 (en) * | 2017-09-08 | 2020-07-28 | Woodward, Inc. | System and method for using solenoid flyback to provide a low voltage solenoid driver power supply |
| US11621134B1 (en) | 2020-06-02 | 2023-04-04 | Smart Wires Inc. | High speed solenoid driver circuit |
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-
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- 2002-07-26 TW TW091116762A patent/TW536583B/en not_active IP Right Cessation
- 2002-08-01 KR KR10-2004-7001308A patent/KR20040018531A/en not_active Application Discontinuation
- 2002-08-01 EP EP02751822A patent/EP1424477A4/en not_active Withdrawn
- 2002-08-01 CN CNB028149572A patent/CN1314892C/en not_active Expired - Fee Related
- 2002-08-01 US US10/485,216 patent/US7154729B2/en not_active Expired - Fee Related
- 2002-08-01 WO PCT/JP2002/007848 patent/WO2003014556A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319635B (en) * | 2005-11-30 | 2011-12-28 | 三菱电机株式会社 | Fuel injection device for engine |
| CN101118816B (en) * | 2006-08-04 | 2012-09-26 | 株式会社日立制作所 | High-pressure fuel pump drive circuit for engine |
| CN105144581A (en) * | 2013-04-25 | 2015-12-09 | 日立汽车系统株式会社 | Electromagnetic coil driving control device |
| US10002699B2 (en) | 2013-04-25 | 2018-06-19 | Hitachi Automotive Systems, Ltd. | Electromagnetic coil driving control device |
| CN114320635A (en) * | 2020-09-30 | 2022-04-12 | 日立安斯泰莫株式会社 | Solenoid valve driving device |
| CN114320635B (en) * | 2020-09-30 | 2024-03-01 | 日立安斯泰莫株式会社 | Electromagnetic valve driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| US7154729B2 (en) | 2006-12-26 |
| TW536583B (en) | 2003-06-11 |
| JP2003049687A (en) | 2003-02-21 |
| EP1424477A4 (en) | 2008-10-01 |
| EP1424477A1 (en) | 2004-06-02 |
| KR20040018531A (en) | 2004-03-03 |
| JP4794768B2 (en) | 2011-10-19 |
| CN1314892C (en) | 2007-05-09 |
| WO2003014556A1 (en) | 2003-02-20 |
| US20040212944A1 (en) | 2004-10-28 |
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